Dallas Mavericks center Dwight Powell underwent surgery to repair a torn right Achilles tendon, an injury that ended his season. The team said Monday the surgery was performed by Dr. Bob Anderson in Green Bay, Wisconsin. The 28-year-old Powell could be ready for training camp in early October, although the timetable could be more in line with the start of the regular season. Powell will be off the court for a significant amount of time. He was already ruled out for the rest of this campaign. Powell will also miss all of his summer work. The best-case scenario is he is cleared for […]